Sol Materials Science and EngineeringCH13.pdf

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1、13-1CHAPTER13APPLICATIONSANDPROCESSINGOFCERAMICSPROBLEMSOLUTIONSGlassesGlass-Ceramics13.1Twodesirablecharacteristicsofglassesareopticaltransparencyandeaseoffabrication.Excerptsfromthisworkmaybereproducedbyinstructorsfordistributiononanot-for-profitbasisfortestingorinstructionalpurpose

2、sonlytostudentsenrolledincoursesforwhichthetextbookhasbeenadopted.AnyotherreproductionortranslationofthisworkbeyondthatpermittedbySections107or108ofthe1976UnitedStatesCopyrightActwithoutthepermissionofthecopyrightownerisunlawful.13-213.2(a)Crystallizationistheprocesswherebyaglassmater

3、ialiscausedtotransformtoacrystallinesolid,usuallybyaheattreatment.(b)Twopropertiesthatmaybeimprovedbycrystallizationare(1)alowercoefficientofthermalexpansion,and(2)higherstrengths.Excerptsfromthisworkmaybereproducedbyinstructorsfordistributiononanot-for-profitbasisfortestingorinstruct

4、ionalpurposesonlytostudentsenrolledincoursesforwhichthetextbookhasbeenadopted.AnyotherreproductionortranslationofthisworkbeyondthatpermittedbySections107or108ofthe1976UnitedStatesCopyrightActwithoutthepermissionofthecopyrightownerisunlawful.13-3Refractories13.3Forrefractoryceramicmate

5、rials,threecharacteristicsthatimprovewithincreasingporosityare(1)decreasedthermalexpansionandcontractionuponthermalcycling,(2)improvedthermalinsulation,and(3)improvedresistancetothermalshock.Twocharacteristicsthatareadverselyaffectedare(1)load-bearingcapacityand(2)resistancetoattackby

6、corrosivematerials.Excerptsfromthisworkmaybereproducedbyinstructorsfordistributiononanot-for-profitbasisfortestingorinstructionalpurposesonlytostudentsenrolledincoursesforwhichthetextbookhasbeenadopted.AnyotherreproductionortranslationofthisworkbeyondthatpermittedbySections107or108oft

7、he1976UnitedStatesCopyrightActwithoutthepermissionofthecopyrightownerisunlawful.13-413.4(a)FromFigure12.25,foraspinel-bondedmagnesiamaterial(88.5wt%MgO-11.5wt%AlO),the23maximumtemperaturewithoutaliquidphasecorrespondstothetemperatureattheMgO(ss)-[MgO(ss)+Liquid]boundaryatthiscompositi

8、on,wh